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But it looks horrible, there's a lot of dithering.



It looks perfect in Firefox and Chrome and IE and locally, for me. The slightest of banding on the tab, now I come to look for it. I guess you're using a browser that doesn't render animated GIFs very well.

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I tested on Chrome 23, Firefox 15 and Safari 6 on Mac OS X. All the same result.

Edit: looks the same in Photoshop too: http://i.imgur.com/nu90E.png

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That's really interesting. I'm on Windows 7. Just tested in Debian Linux and it's fine there too. Must be a Mac issue?

(Edit: I confirm that I can see faint green spots all over the background in your Photoshop screenshot.)

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Likely. I remembered OSX used to have few issues with GIF rendering in Core Graphics, but I'm sure Chrome and Firefox aren't using Core Graphics for GIF rendering. Strange.

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I have the same issue as sirn on Firefox on Win7. edit: also chrome and IE.

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Just a thought - are you in True Color (32-bit) mode?

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Yes. I'm guessing gamma is to blame here.

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Looks fine in FF on my MBP!

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Could it be just because we've got our monitors set to different gammas? Here's a frame from the animated gif, which still looks fine to me: https://picasaweb.google.com/lh/photo/oaNDcnogej-bbrArcXuzK9...

Does this look dithered to anyone?

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This one looks good to me. Animated gif, on the other hand, does look dithered on its background. Ubuntu 12.04, Chromium 18.0.1025.168.

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This one looks perfectly fine to me. Gamma 2.2 (Mountain Lion default).

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OK. Well I guess this supports the original poster's motivation, that animated GIFs can't be relied on.

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Looks fine in Chrome on my MBA as well.

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Looks fine in FireFox 10 ESR on Solaris 11.

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